AEG VB2 Plus Generator Circuit Breaker User Manual
- June 3, 2024
- AEG
Table of Contents
AEG VB2 Plus Generator Circuit Breaker
Caution!
Please read this manual carefully before installing and using the circuit
breaker: The installation and use of circuit breakers must comply with the
requirements of this manual. Circuit breaker should be used in accordance with
the normal indoor environmental conditions. Any operation and maintenance of
the circuit breaker should be carried out by professional trained fulltime
electrical personnel. It is forbidden to operate the circuit breaker beyond
its rated parameters. Attention must be paid to any identification of circuit
breakers. It is necessary to ensure the applicability and safety of
interlocking conditions and working procedures of circuit breakers. It is not
allowed to carry out maintenance work when the switch cabinet and secondary
control circuit are charged. It must be ensured that the circuit breaker is
not impacted by any external force, otherwise the equipment will be damaged.
Any illegal operation of the circuit breaker may damage the equipment and even
cause serious accidents. This manual should be placed in a convenient place.
Professional personnel should be responsible for the safety management of
circuit breakers.
Overview
General:
VB2 Plus generator circuit breaker (hereinafter referred to as circuit
breaker) is suitable for indoor air insulated switchgear components. It is the
best choice for control and protection in small garbage power generation,
thermal power generation and hydropower generation system.
General provisions:
- VB2 Plus generator circuit breaker complies with the following standards：
- GB/T 14824 High-voltage alternating-current generator circuit-breaker
- IEC/IEEE 62271-37-013 High-voltage alternating-current generator circuit-breaker
- IEC60694 Common specifications for high-voltage switchgear and controlgear standards
- DL/T403 HV vacuum circuit-breaker for rated voltage 12kV to 40.5kV
Normal operating conditions:
- Ambient temperature
- Maximum temperature: + 40ºC
- Minimum temperature: – 25ºC
- Maximum daily average temperature: + 35ºC
Ambient humidity
- Daily average relative humidity: ≤95%
- Monthly average relative humidity: ≤90%;
- Daily average saturated vapor pressure: ≤2.2×10-3 Mpa
- Monthly average saturated vapor pressure: ≤1.8×10-3 Mpa
- Altitude: ≤ 1000m, conventional products can be used below 1000m above sea level, and high-altitude products need to be noted when ordering.
- Earthquake intensity: No higher than Level 8
Others: no inflammable and explosion hazard, no chemical corrosive gas
and no violent vibration.
Note: in case of different use environment or other special requirements,
it is necessary to consult with the manufacturer.
Structural principle
Main structure
The conductive circuit of the circuit breaker is a fixed structure, and the
conductive circuit is set in the insulating parts. This structure can
effectively prevent the influence of external factors such as external force
impact and pollution environment on the vacuum interrupter. The conductive
circuit of the circuit breaker is installed at the back of the mechanism box
and connected with the mechanism as a whole. Primary circuit current route:
when breaker is at the closing position, current flow from the upper terminal
to the upper bracket , which is fixed in the arc quenching chamber, then into
the vacuum interrupter contacts, the movable contact, and connection of
conductive clips, soft connection, to the lower terminal, the insulating pull
rod and the internal disc spring pass through the connecting rod of the
circuit breaker to complete the operation movement of the circuit breaker and
keep the contact.(Fig.2)
Operating mechanism
The operating mechanism of the circuit breaker is a spring energy storage
mechanism. There are a closing unit, an opening unit composed of one or
several coils, auxiliary switch, indicating device and other components in the
mechanism box; the front is provided with a closing and opening button, a
manual energy storage operation hole, spring energy storage status indicator
board and closing and opening indicator board.(Fig.1,2)
-
closing spring
-
closing/opening indicator
-
opening latch
-
charging indicator
-
counter
-
micro-switch
-
charging motor
-
manual charging shaft
-
motor output shaft
-
small gear
-
large gear
-
closing coil
-
closing plate
-
opening coil
-
over-current coil/secondary
tripping coil -
energy storage keeping block
-
energy storage latch
-
closing interlock block
-
handcart interlock block
-
upper terminal
-
vacuum chamber
-
lower terminal
-
insulated pull rod
-
output arm
-
opening spring
Energy storage
The energy required for closing the circuit breaker is provided by the closing
spring. Energy storage can be done either by motor or by hand with energy
storage handle. Energy storage operation: it is carried out by the energy
storage motor 7 fixed on the frame or by inserting the energy storage handle
into the manual energy storage shaft 8 and shaking it clockwise. The gear
system is driven by motor output shaft 9 for electric energy storage, and the
gear system is driven by manual energy storage shaft 8 for manual energy
storage. When the small gear rotates, it drives the big gear to move together,
thus pulling the energy storage spring to store energy. When the energy
storage position is reached, the energy storage holding block is supported by
the energy storage holding block to separate the clutch and maintain the
energy storage position. The energy storage indicator board shows the tension
state of the tension spring, and the energy storage is completed. The micro-
switch cuts off the power supply of the energy storage motor, and the circuit
breaker is in the closing-ready state.
Closing
During the closing process, whether manually pressing the “closing” button or
remote operation to make the closing coil 12 act, the energy storage holding
device can be turned away from the energy storage holding block. Under the
action of the closing spring force, the cam drives the cam to rotate, and the
cam drives the connecting rod mechanism to drive the insulating rod 23 and the
moving contact of thearc extinguishing chamber to close. After the closing
action is completed, the opening holding switch and the opening half shaft are
kept in the buckle state. At the same time, the energy storage indicator board
and auxiliary switch are reset, and the motor power supply circuit is
connected. If the external power supply is also connected, it will enter the
energy storage state again, and the connecting rod will pull the on / off
indicator to indicate the position of “┃”, at the same time, pull the counter
to realize counting, and drive the connecting rod to pull the spindle to drive
the auxiliary switch to switch.
Note: when the circuit breaker is in the closing state, or the closing locking
device is selected but the external power supply is not connected, and the
handcart type circuit breaker is in the process of propulsion, the closing
operation cannot be carried out.
Opening
It can not only press the “opening” button, but also connect the external
power supply to make the opening coil or over-current coil act, so that the
opening holding switch and the opening half axis are unlocked to realize the
opening operation. The energy stored by the contact spring and the opening
spring 25 separates the dynamic and static contacts of the arc extinguishing
chamber 21. In the later stage of the opening process, the hydraulic buffer
absorbs the residual energy and limits the opening position. Pull the “O”
connecting rod to switch off the switch.
Undervoltage protection function
When the second control voltage is less than or equal to 90% of the rated
voltage, the Undervoltage module must start to store energy for components and
enter the holding state; when the second control voltage drops to 65% of the
rated voltage, the energy of the Undervoltage module is released to the
opening coil of the circuit breaker to release the opening holding switch and
the opening half shaft So as to realize the opening operation.
Anti misoperation interlock
The circuit breaker can provide a perfect anti-misoperation function
- After the closing operation of the circuit breaker is completed, the closing interlocking board 18 rotates against the closing board 13, and it cannot be closed again when the circuit breaker is not opened.
- After closing the circuit breaker, if the closing electric signal is not removed in time, the internal anti tripping controller of the circuit breaker will cut off the closing circuit to prevent multiple reclosing.
- When the handcart-type circuit breaker fails to reach the test position or working position, the handcart interlocking board 19 shall buckle the closing board and cut off the closing circuit to prevent the circuit breaker from entering the load area in the closing state.
- After the handcart-type circuit breaker is closed in the working position or test position, the trolley will not be able to move if the roller presses the pushing mechanism, so as to prevent pulling out or pushing the load area in the closing state.
- If electrical closing locking is selected, the manual closing operation is prevented when the secondary control power supply is not connected.
Technical parameter
Main technical parameter
| No. | Item | Unit | Value |
|---|---|---|---|
| 1 | Rated voltage Ur | kV | 15 |
| 2 | Rated frequency fr | Hz | 50/60 |
| 3 | Rated insulation level | Rated power frequency |
withstand voltage (1 min) Ud
| kV|
50
Rated lightning impulse
withstand voltage Up
|
95
4| Rated current| Ir （ Note: air cooling is not required）| A| 1600,2000,
2500,3150
| 1600,2000,
2500,3150
| 1600,2000,
2500,3150,
Ir,efc （ Note: air cooling is
required）
| |
4000,5000
|
4000,5000
5| Rated system supplied fault short-circuit
breaking current Isc
| kA|
31.5
|
40
|
50
6| Asymmetry of rated system source short-circuit
breaking current
| %|
77
7| Rated short-circuit making current (peak) IMC| kA| 86.3| 110| 137
8| Rated generator supplied fault short-circuit
breaking current Iscg
| kA|
15.8
|
25
|
25
9| Asymmetry of rated generator source short-
circuit breaking current
| %|
130
10| Rated out of step making and breaking current Id| kA| 15.8| 20| 25
11| Rated load switching current| A| 1600,2000,
2500,3150
| 1600,2000,
2500,3150,
4000,5000
| 2000,2500,
3150,4000,
5000
12| Rated short-time withstand current Ik| kA| 31.5| 40| 50
13| Rated peak withstand current Ip| kA| 86.3| 110| 137
14| Rated short circuit duration tk| s| 3
15| Rated operating sequence| | CO-30min-CO
16| Mechanical life| times| 10000
Mechanical characteristic parameters
| No. | Item | Unit | Value |
|---|---|---|---|
| 1 | Rated voltage | kV | 15 |
| 2 | Opening time (rated voltage) |
ms
| 20~50
3| Closing time (rated voltage)| 30~70
4| Contact distance|
mm
| 10±1.0
5| Contact travel| 3.5±0.5
6| Closing bounce time|
ms
| ≤2
7| Three-phase opening/closing| ≤2
8| Average opening speed|
m/s
| 0.9~1.3
9| Average closing speed| 0.4~0.8
10| Main loop resistance| μΩ| ≤40(1600~2000A) ; ≤35(above 2500A)
11| Opening/closing rating voltage|
V
| AC/DC110V ; AC/DC220V
12| Rated voltage of energy storage motor| AC/DC110V ; AC/DC220V
13| Energy storage time| s| ≤10
Technical parameters of operating mechanism and locking electromagnet
Rate voltage (V)
|
Energy storage motor (A)
|
Closing coil (A)
|
Opening coil (A)
| Lockout electromagnet (mA)
---|---|---|---|---
DC 110| 2.0| 2.2| 2.2| 35
DC 220| 1.0| 1.3| 1.3| 20
Dimensions
The breaker is handcart type. It is equipped with the corresponding chassis. The chassis car is equipped with a corresponding roller, position switch, locking electromagnet and interlocking mechanism. The overall dimensions are shown in the figure below
- withdrawable – 275mm apart
- withdrawable – 275mm apart
Electrical schematic diagram
Conventional circuit breaker products are equipped with the anti-trip circuit, but according to the needs of users, the anti-tripping circuit can be removed. The internal wiring diagram of 64 core handcart type circuit breaker is shown in Fig. 3, 58 core internal wiring diagram is shown in Fig. 4, and internal wiring diagram of fixed circuit breaker is shown in Fig. 5
- Withdrawable (64 cores)
- Withdrawable (58 cores)
- Fixed type (terminal)
Installation, commissioning and operation
-
When the circuit breaker is lifted from the packing box, the hook shall be hung on the lifting position with a lifting mark on the circuit breaker. When moving, the upper and lower outlet arms shall not be stressed, and the circuit breaker shall not be subject to large impact and vibration.
-
The circuit breaker installed in the switch cabinet shall not be subject to tension or deformation, and the bolt at the bottom mounting point shall be added with disc spring gasket. When connecting the main terminal, the main terminal shall not be subject to permanent tension and pressure (such as the bus bar). When connecting the bus, bolts with strength ≥ 8.8 and disc spring are used to fasten the bus.
-
Push the handcart type circuit breaker into the switch cabinet according to the following steps:
Swing the circuit breaker into the push in hole, clockwise to push in (counterclockwise to exit). The total driving distance is about 200 mm. In the opening state, you should enter the working position or test position smoothly. Please turn the handle at medium speed for 20 turns. When you hear the “click” position switch mechanism action sound, it is in place (do not damage the propulsion mechanism due to excessive force). -
In case of problems in operation, determine the causes according to the table below. If it can’t be solved, please contact the manufacturer. Do not disassemble the circuit breaker by yourself.
No.| Fault phenomena| Reasons
---|---|---
1
|
Failure to closing
| 1. The breaker is in the closing position state
2. The handcart does not fully come into operation position or test position
3. The closing locking device is employed and the auxiliary supply is
unconnected or lower than the specifications
4. secondary circuit is incorrect
2
|
The handcart cannot be pushed in or pulled out
| 1 The breaker is in the closing position state
2 The pushing- handle is not fully inserted into the pushing hole.
3. The pushing mechanism is not fully placed at the test position, so that
the clapper cannot be unlocked with the cabinet body
4. The cabinet body earthing interlocking is not released
5. The commissioning and operation work shall be carried out by specially trained personnel who have a detailed understanding of the performance of the circuit breaker. The corresponding protection and prevention measures must be considered in the work.
One of the preconditions for trouble free operation is to use the circuit breaker under normal working conditions according to the corresponding provisions of GB / T 14824 and IEC/IEEE 62271 standards.
- Check the circuit breaker for damage or any other harmful environmental impact. If there is such a phenomenon, it should be eliminated before power on to restore to normal working conditions.
- Remove dirt, especially on the surface of insulating parts. These may be due to contamination during transportation or storage, which may affect the insulation performance of the product.
- Check the connection status of primary circuit contact, secondary circuit connection and grounding body.
- Manual operation test.
Maintenance
Maintenance must be carried out by AEG personnel or the user’s personnel who are familiar with the equipment and have been trained and qualified. If the maintenance is carried out by the user’s personnel, the user shall be responsible for the consequences of the repair.
- During normal use, the circuit breaker is free of maintenance. Because the circuit breaker has the characteristics of simple structure and durability, it has a long service life. The maintenance work is related to the wear and aging of parts. In order to make the circuit breaker work reliably, the interval time and range of maintenance work needed to be carried out will depend on the influence of working environment, operation times, operation time and short circuit current breaking times and other factors.
- Before maintenance, all auxiliary power supply must be disconnected and there is no danger of power transmission again. The circuit breaker itself is open and the spring is not stored energy. In order to prevent accidents, special care should be taken in the operation mechanism.
- Disassembly and replacement of circuit breaker parts shall be carried out by AEG personnel or corresponding trained personnel, especially during reassembly, necessary adjustment shall be made.
- Maintenance of circuit breaker
- The operation structure shall be inspected when the circuit breaker has been operated for 5 years (from the day when the new equipment is put into operation) or when the circuit breaker operates for the specified times (4000 times for the circuit breaker with 31.5kA, and 2500 times for the circuit breaker with 40kA) :
- Cut off the energy storage power supply and operate the circuit breaker to close and open once to release energy.
- Check the grease condition of rolling or sliding bearing surface.
- Check the correctness of each component function during electrical and mechanical action.
- Do a comprehensive appearance inspection。
- The operation structure shall be maintained after 10 years of operation (calculated from the day when the new equipment is put into operation) or the operation times of the circuit breaker (31.5 kA circuit breaker for 8000 times, 40 kA circuit breaker for 5000 times) :
- Cut off the energy storage power supply and operate the circuit breaker to close and open once to release energy.
- Re-apply grease to the supporting shaft, rolling and sliding bearing.
- Check the correctness of each component function during electrical and mechanical action.
- Check the condition or looseness of fasteners installed at the connecting rod, crank arm, and supporting rod.
- During maintenance, it is important to check the parts which are subjected to high stress during operation. In case of replacement of parts, all fasteners shall be replaced. A comprehensive review of the operating mechanism.
- After the circuit breaker has been running for about 5 years or when the operating mechanism is under maintenance, the circuit breaker body should also be inspected. Especially when inspecting the appearance, it is also necessary to check the contamination, damp,ness and corrosion of the equipment surface. Clean the dust on the surface of insulating parts with dry cloth, and then wipe all kinds of dirt with silk cloth with a household alkaline cleaning agent or safety cleaner (pay attention to whether the detergent used is applicable to plastic and synthetic rubber materials), and do not use carbon tetrachloride or trichloroethylene to wipe.
The minimum interval of the above inspection work shall be less than 5 years for the switchgear operating in some special use occasions or under harmful environmental conditions (such as in an environment with high pollution and heavy corrosive gas).
Transportation and storage
-
When the product is transported, the circuit breaker shall be placed in a closed packing box
without energy storage, and a proper amount of desiccant shall be built in. The circuit breaker shall be
protected with plastic film to prevent water penetration during loading and unloading and dust intrusion
during storage. -
The following tools shall be used to load and unload the packing box
- Crane
- Forklift
- Driving
-
Pay attention to the following items during transportation:
- Avoid shocks
- Avoid other destructive mechanical forces
- The lifting appliance should not be hooked on the circuit breaker body or operating mechanism. It should be hooked at the lifting position with lifting mark.
-
The circuit breaker shall be stored in the state of opening of operating mechanism and energy storage spring without energy storage.
Basic storage requirements
- The dry and well ventilated storage room shall meet the relevant provisions of GB /T 11022.
- The temperature of the storage room shall not be lower than – 15 ° C.
- Do not disassemble or damage the package. Cover with a protective light covering and maintain adequate ventilation.
- Regularly check whether there is condensation phenomenon and other conditions not suitable for storage requirements.
Random documents
- Product certificate
- Factory inspection report
- Packing list
Spare parts
When the user needs, the spare parts can be determined according to the following list, and put forward when ordering, so as to meet the needs.
Order number (SAP)|
Product model
---|---
26400056| Over-current tripping coil (Y8)
36490042| Over-current control circuit board
26490381| Closing locking electromagnet (S4)
26490463
| Closing/opening control circuit board (please mention: operation voltage,
whether there is anti- tripping, whether there is locking)
26490093| Closing/opening auxiliary switch (QF)
26490090| Handcart position auxiliary switch (S8, S9)
26490580| Energy storage position switch (S1, S2, S3)
26490598| Position locking switch (110V)
26490076| Position locking switch (220V)
26400055| Closing/Opening coil (110V)
26400054| Closing/Opening coil (220V)
26490375| 12kV breaker energy-saving motor (100W, 110V)
26490359| 12kV breaker energy-saving motor (100W, 220V)
26490349| Pushing handle for withdrawable-type breaker
26490365| Mechanism energy-saving handle
26490033| Counter
GEIS BREAKERS (SHANGHAI) CO.,LTD.
(An AEG Company）